I have been suspecting that the timing on my 92z34 is really off. What would be a few symptoms of this? As of right now the car bucks alot if i am in 1st or 2nd and let off the gas and bucks even more if i give it gas after it has been coasting. Under full throttle the car doesn't buck at all, it is slow though(i can barely run low 16s consistently and i only trap 85). The cars exhaust smells like shit. I have changed the cat, plugs, coils, o2 sensor, shut off the egr, had a brand new 284, clutch, pp, and t/o bearing installed, and other basic stuff. The car doesn't smoke. It always cranks. I will be getting some $$$ for christmas and was thinking about having the local Chevy dealer change the belt and check the cam timing. Do these symptoms sound like bad timing to ya'll? Please respond with your opinion.